Species

Floor of cavity

Depth of cavity

Entrance above floor

Entrance diameter

Height above ground

Inches

Inches

Inches

Inches

Feet

Bluebird

5x5

8

6

1 ½

5-10

Robin

6x8

8

A

6-15

Chickadee

4x4

8-10

6-8

1 ⅛

6-15

Titmouse

4x4

8-10

6-8

1 ¼

6-15

House Wren

4x4

6-8

1-6

1 ¼

6-10

Nuthatch

4x4

8-10

6-8

1 ¼

12-20

Carolina Wren

4x4

6-8

1-6

1 ½

6-10

Violet Green Swallow

5x5

6

1-5

1 ½

10-15

Tree Swallow

5x5

6

1-5

1 ½

10-15

Barn Swallow

6x6

6

B

B

8-12

Purple Martin

6x6

6

1

2 ½

15-20

Song Sparrow

6x6

6

B

B

1-3

House Finch

6x6

6

4

2

8-12

Starling

6x6

16-18

14-16

2

10-25

Phoebe

6x6

6

A

A

8-12

Crested Flycatcher

6x6

8-10

6-8

2

8-20

Flicker

7x7

16-18

14-16

2 ½

6-20

Golden-fronted Woodpecker

6x6

12-15

9-12

2

12-20

Red-headed Woodpecker

6x6

12-15

9-12

2

12-20

Downy Woodpecker

4x4

8-10

6-8

1 ¼

6-20

Hairy Woodpecker

6x6

12-15

9-12

1 ½

12-20

Screech Owl

8x8

12-15

9-12

3

10-30

Saw-whet Owl

6x6

10-12

8-10

2 ½

12-20

Barn Owl

10-18

15-18

4

6

12-18

Sparrow Hawk

8x8

12-15

9-12

3

10-30

Wood Duck

10-18

10-24

12-16

4

10-20